Vaaka ANT+ Paddle Cadence Sensor, We Ship Worldwide! This product ships worldwide, please ignore any Amazon shipping warnings ANT+ wireless technology for compatibility with smartphones and all third party ANT+ GPS sports devices Real time stroke rate feedback for Kayak, Canoe, SUP. Outrigger and Dragonboat. Works on single and double bladed paddles. Intelligent algorithm allows stroke rate feedback even in rough conditions Award winning design for the marine environment, robust and fully waterproof.